since i've been using alot of wild rose and other wavy shoots that can be a bear to straighten,
I made this adjustable shaft press from scrap wood and have been enjoying it..in fact i maybe addicted now.
the press sits on my work table with an anchored hook behind it to make it a one handed operation.
it takes a little getting used to..its easy to dent a shaft with too much force, so i put a piece of leather around the handle for a bit of cushion.
which can be slid away if I'm working a hard wood.
I've never seen anybody make one of these , but i'm sure its been done.